code: def test_DummyEnsembleModel(self):
      for shape in [(10, 3), (5, 10, 3)]:
          e = DummyEnsembleModel()
          X = torch.randn(*shape)
          p = e.posterior(X)
          self.assertEqual(p.ensemble_size, 4)
  
file_path: botorch/test/models/test_ensemble.py
imports: import torch
  from botorch.models.ensemble import EnsembleModel
  from botorch.utils.testing import BotorchTestCase
label_desc: Use image node_id 2 for calling the TestEnsembleModels obj's underlying member method code with example usage: obj.test_DummyEnsembleModel() without return types